[
https://issues.apache.org/jira/browse/BEAM-5036?focusedWorklogId=150766&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-150766
]
ASF GitHub Bot logged work on BEAM-5036:
----------------------------------------
Author: ASF GitHub Bot
Created on: 03/Oct/18 14:41
Start Date: 03/Oct/18 14:41
Worklog Time Spent: 10m
Work Description: timrobertson100 commented on issue #6289: [BEAM-5036]
Optimize the FileBasedSink WriteOperation.moveToOutput()
URL: https://github.com/apache/beam/pull/6289#issuecomment-426662992
I've run some PerfKit tests for [HDFS with this
PR](https://builds.apache.org/job/beam_PerformanceTests_TextIOIT_HDFS/744/console)
and [GCS with this
PR](https://builds.apache.org/job/beam_PerformanceTests_TextIOIT/1086/console).
The last 6 timings for each are:
### HDFS
```
08:33:54 run_time 530.203248 seconds
14:33:30 run_time 509.528935 seconds
20:32:50 run_time 442.749163 seconds
02:31:21 run_time 402.220293 seconds
08:31:30 run_time 413.367303 seconds
-- and with this PR:
14:30:40 run_time 378.867292 seconds
```
### GCS
```
14:32:25 run_time 390.459900 seconds
20:32:06 run_time 424.058663 seconds
02:31:45 run_time 412.350028 seconds
08:33:19 run_time 524.147186 seconds
14:31:16 run_time 364.864536 seconds
-- and with this PR:
16:19:23 run_time 387.196383 seconds
```
Given these are using 1 million records only and small clusters I don't they
tell us all that much, but thought it worth capturing here regardless.
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Issue Time Tracking
-------------------
Worklog Id: (was: 150766)
Time Spent: 9h 40m (was: 9.5h)
> Optimize FileBasedSink's WriteOperation.moveToOutput()
> ------------------------------------------------------
>
> Key: BEAM-5036
> URL: https://issues.apache.org/jira/browse/BEAM-5036
> Project: Beam
> Issue Type: Improvement
> Components: io-java-files
> Affects Versions: 2.5.0
> Reporter: Jozef Vilcek
> Assignee: Tim Robertson
> Priority: Major
> Time Spent: 9h 40m
> Remaining Estimate: 0h
>
> moveToOutput() methods in FileBasedSink.WriteOperation implements move by
> copy+delete. It would be better to use a rename() which can be much more
> effective for some filesystems.
> Filesystem must support cross-directory rename. BEAM-4861 is related to this
> for the case of HDFS filesystem.
> Feature was discussed here:
> http://mail-archives.apache.org/mod_mbox/beam-dev/201807.mbox/%3CCAF9t7_4Mp54pQ+vRrJrBh9Vx0=uaknupzd_qdh_qdm9vxll...@mail.gmail.com%3E
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